Editing 1915 (section)

=== April ===
{{main|April 1915}}
* [[April 5]] – Boxer [[Jess Willard]], the latest "Great White Hope", defeats [[Jack Johnson (boxer)|Jack Johnson]] with a 26th-round knockout in sweltering heat, at Havana, Cuba. Willard becomes very popular among white Americans, for "bringing back the championship to the white race".
* [[April 11]] – [[Charlie Chaplin]]'s film ''[[The Tramp (film)|The Tramp]]'' is released in the United States.
* [[April 21]] – On the orders of [[Talat Pasha]], Haydar Bey organized an [[Haydar Bey's Assyrian Expedition|expedition]] against the Assyrians. He killed thousands of [[Assyrians]] along with [[Kurdish tribes]].
* [[April 22]] – WWI: Start of [[Second Battle of Ypres]] – Germany makes its first large scale use of [[chemical weapons|poison gas]] on the Western Front.
* [[April 24]] – Armenian genocide: [[Deportation of Armenian intellectuals on 24 April 1915|deportation of Armenian notables]] from [[Istanbul]] begins.
* [[April 25]] – WWI: Start of the [[Gallipoli Campaign]] by land forces (lasting until January 1916) – A [[landing at Anzac Cove]] is conducted by [[Australian and New Zealand Army Corps]], and a [[landing at Cape Helles]] by British and French troops, to begin the Allied invasion of the [[Gallipoli]] peninsula in the [[Ottoman Empire]].
[[File:RMS Luisitania.jpg|thumb|250px|right| [[May 7]]: WWI: {{RMS|Lusitania}}, sunk by a German [[U-boat]].]]
* [[April 26]] – [[Treaty of London (1915)|Treaty of London]]: Italy secretly agrees to leave the [[Triple Alliance (1882)|Triple Alliance]] with Germany and [[Austria-Hungary]], and join with the [[Allies of World War I|Entente Powers]], in exchange for certain territories of Austria-Hungary on its borders.